Malicious PDF — malware analysis report

Static analysis result for SHA-256 317c40ee4412df26…

MALICIOUS

PDF

81.9 KB Created: 2021-09-13 23:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5844e84c6bf6f54c1278b39e74453e01 SHA-1: ca02d40467c10ee7eacdd1c93c941425d3125ac4 SHA-256: 317c40ee4412df2673dacb7bd32c951723c05e64dec906eaf96715d9a36b6790
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting multiple URLs that point to other PDF files hosted on various websites, some of which appear to be compromised. The presence of a 'Password-protected archive lure' heuristic suggests that this document may be intended to trick users into downloading an archive, possibly containing a further payload, after providing a password. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/c217b47aed4d51532cbe7f60fcbf2de0/5147858340.pdf In PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/26f027oqk4d6v6v8hb7ba5cirv/92863248493.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac27c42fa1---4380858588.pdfIn PDF document text
    • http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/jasop.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/dulexa.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/93413914929.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161328230a6e17---34444144485.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2c5eb98a7---fowezozufexofutezadul.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/35348076055.pdfIn PDF document text
    • http://www.pilatesyoga.hr/files/files/32012932594.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/90ec3f5760c918cd25374e5bf4b2d20b/97792076043.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/vojaparuvapumedezut.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc53dd104e---93971120.pdfIn PDF document text
    • http://auto-rad.pl/userfiles/file/30065313963.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/jatosogodexaz.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d816f7735e---fapibikekeroduvusalod.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/rolawolonowoj.pdfIn PDF document text
    • https://datajournonepal.org/files/tididusinisekojaker.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/62602041498.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/nobaruwosurepitojifegop.pdfIn PDF document text
    • https://coil.hk/upload/files/bitefewewirixewan.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/40897438262.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318f47114f2---23261616762.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/dugumukumetebowudazesiruv.pdfIn PDF document text
    • http://esistore.de/userfiles/file/nozef.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/70333500194.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cerrar+sesi%C3%B3n+gmail+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DF 18232 bytes
SHA-256: 58e879b071c84bc493b6e78814608a9ce25661d497d8530635c95bc8d2ec6b88
font_02_sfnt_off00011fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB3 10660 bytes
SHA-256: dc3ab324fb5bcc65e2d568a30222784a602961a34379a6fa69d9e2bc43923d9a

Open this report in the interactive analyzer, or submit your own file for analysis.